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Apple has unveiled CarPlay, a service that will allow greater connectivity between the car and the driver's iPhone.

It allows drivers to connect their phone and make calls, use the phone's maps, listen to music and access messages. It can be accessed through the car's own infotainment system or via voice control.

The driver will be able to activate Siri, the iPhone's voice control, by pressing the voice control button on the car's steering wheel. Siri will then allow drivers to listen to their text messages and dictate a reply.

The system will also be able to provide sat-nav by displaying the phone's map and reading out directions. Apple says the nav will be able to predict destinations based on your recent trips by looking at your emails, contacts and text messages.

CarPlay also allows the driver to play all of their music and podcasts through the car's speakers, as well as allowing access to third-party streaming apps such as Spotify and online radio.

Apple CarPlay is available only with the latest version of Apple's software, iOS7 and on the iPhone 5, 5S and 5C.

Ferrari, Mercedes and Volvo are the first manufacturers to show the technology at this week's Geneva motor show. BMW, Citroen, Ford, General Motors, Honda, Hyundai, Jaguar Land Rover, Kia, Mitsubishi, Nissan, Peugeot, Subaru, Suzuki and Toyota are all set to adopt the technology later.